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Unformatted text preview: Math 202-02 Exam 2 Spring 2008 Name: ID: Date: Directions: Please show all work unless specified otherwise. Basic scientific calculators are okay, but no graphing calculators. Graphing calculator usage will result in a score of a zero. 1. (8 pts) Given the revenue function for math books R ( x ) = 60 x 2 2 x + 1 , in millions of dollars where x is millions of books, find the marginal revenue function. Also, find MR (2) and what it predicts about the sale of more units? 2. (8 pts) Given f ( x ) = x 4 4 + 2 x 3 3- 2, find the critical values, find where the function is increasing and where it is decreasing, and classify the critical points as either relative maxima, relative, minima, or horizontal inflection points. Justify your answer. 3. (8 pts) Suppose that our chain of math book stores sales volume, in millions, is given by y = 90 p + 5 ,p > 10, where p is price. Is the function always increasing or decreasing?...
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- Fall '08